Wednesday, September 3, 2014

lymphatic drainage of the oral structures- mcq review

1.You notice that your patient's submandibular lymph nodes are enlarged. You would look for potential infection sites in the
a) hard palate.
b) hard palate and upper lip.
c) hard palate, upper lip and upper central incisor.
d) hard palate, upper lip, upper central incisor and lower first molar.

2.The regional lymphatic drainage of the left side of the tip of the tongue is to the
a) left submental lymph node.
b) left and right submental lymph nodes.
c) left submandibular lymph node.
d) left and right submandibular lymph nodes.

The skin of the head and neck drains

The scalp drains into the occipital, mastoid and parotid nodes.

Lower eye lid and anterior cheek drains into buccal LNs.

The cheeks drain into the parotid, buccal and submandibular nodes.

The upper lips and sides of the lower lips drain into the submandibular nodes.

 The middle third of the lower lip drains into the submental nodes

The skin of the neck drains into the cervical nodes.

The drainage of the oral structures

The gingivae drain into the submandibular, submental and upper deep cervical lymph nodes.

The palate lymph vessels may pass to submandibular or superior deep cervical nodes (level II). Retropharyngeal nodes are very rarely involved.

Teeth drain into the submandibular and deep cervical lymph nodes.

Anterior part of mouth floor drain into submental and upper deep cervical.

Posterior part of mouth floor  into submandibular and upper deep cervical.

Sunday, August 31, 2014

Inferior alveolar nerve block- mcq review

During an inferior alveolar nerve block the needle ideally passes
a) posterior and medial to medial pterygoid.
b) anterior and lateral to medial pterygoid.
c) through medial pterygoid.
d) inferior to medial pterygoid.


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